What is the Least Common Multiple of 21424 and 21431?

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.

Least Common Multiple of 21424 and 21431 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21424 and 21431, than apply into the LCM equation.

GCF(21424,21431) = 1
LCM(21424,21431) = ( 21424 × 21431) / 1
LCM(21424,21431) = 459137744 / 1
LCM(21424,21431) = 459137744

Least Common Multiple (LCM) of 21424 and 21431 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21424 and 21431. First we will calculate the prime factors of 21424 and 21431.

Prime Factorization of 21424

Prime Factorization of 21431

Now multiplying the highest exponent prime factors to calculate the LCM of 21424 and 21431.

LCM(21424,21431) = 2⁴ × 13¹ × 103¹ × 29¹ × 739¹
LCM(21424,21431) = 459137744